The Profoto Pro-B4 1000 Air Pack with Battery and Charger supplies 1,000W/s of portable flash power in a compact, 21.6 lb package, with the most advanced long-life battery (LiFe) now available. The Pro-B4 Air gives you everything you want in portable power; up to 220 flashes at full power, super fast recycle time (0.03 - 0.99 sec.), flash durations as short as 1/25,000 sec., and flash variability over a range of 11 stops (1.0-1,000Ws). The LiFe battery gives you up to 4 times the battery life of previous batteries while the built-in Profoto Air radio sync receiver provides remote triggering control from up to 985' (300 m) away. The Pro-B4 Air has been tested, certified and licensed for travel according to the UN manual of Test & Criteria, Part III, Sub-section 38.3 and the included multi-voltage charger allows you to charge the battery on virtually any AC current, ensuring that you'll be able to work anywhere in the world.